When I tried to suggest an edit to this question, I got an error message telling me that I can't create new tags when I was not.

When I removed the [game-development], which is blacklisted on GameDev, the problem went away.

As I understand it, when the question was migrated from Stack Overflow to GameDev, the question was not stripped of its game-development tag. However, since it's blacklisted, the site ignored it. As far the site was concerned, there were only four tags on the question, not five.

So, when I tried to edit the question, the site believed I was trying to create the [game-development] tag even though it was there since before I came to edit the question.

One problem I see with this: Most LaTeX related questions are only tagged with latex on SO or SU. That tag doesn't exist on TeX.SX. So every migrated question will just get closed?
–
CaramdirFeb 10 '11 at 15:40

+1, but I'm curious about your resopnse to Caramdir's question. Also, what kind of notification(s) do(es) the OP/closers get? I ask because I wonder what would happen to this guy.
–
Pops♦Feb 11 '11 at 14:58